I've encountered a slight niggle with -adoupdate, update- that may be
related to Zurab's issue; namely, that it keeps insisting that the
same couple of SSC packages on my list have new versions ready to
download, when in fact they don't: one of them is your very own
-xml_tab-. It does it every time I execute -adoupdate-.

That has happened to me too. Sometimes uninstalling and reinstalling
the package solves the problem. If the problem persists, let Kit
Baum know, as sometimes there is a problem on SSC's side.